MOUNTAIN VIEW, Calif. — February 21, 2006 —
PathScale, the developer of innovative software and hardware solutions to
accelerate high performance computing, today announced that Visual Numerics
has ported its IMSL™ Fortran Numerical Library to the PathScale EKOPath
Compiler Suite. Support of Visual Numerics' Fortran Library will enable
scientific and technical institutions using PathScale's award-winning EKOPath
Compiler to better perform advanced numerical analysis, leading to an
acceleration of breakthroughs in science and engineering.

"Providing access to the IMSL Fortran Numerical Library will enable
developers to build computational applications that address some of the
world's most complex research problems," said Scott Metcalf, president
& CEO of PathScale. "More and more, companies and research
organizations are choosing EKOPath because of its proven performance and solid
reputation for quality on x86-based systems. With the support of Visual
Numerics, aerospace, manufacturing, automotive, and government concerns can
extend the capabilities and reach of EKOPath compilers to address new
computationally intensive challenges.

The EKOPath Compiler Suite from PathScale offers the industry's
highest-performance C, C++, and Fortran 9X compilers for 64-bit
Linux®-based computer systems. It has been optimized for both the AMD64
and Intel EM64T architectures and has the world's most sophisticated
optimization infrastructure.

"Together, PathScale and Visual Numerics will provide leading
scientific and technical organizations the ability to push the limits of
research and engineering," said Phil Fraher, president and CEO of Visual
Numerics. "By supporting the EKOPath high performance compiler, we are
providing the developer community with a strong foundation for creating
advanced computational applications on 64-bit cluster computing systems.

The award-winning PathScale EKOPath compilers can be evaluated free for 30
days by visiting www.pathscale.com/trial.php.

ABOUT PATHSCALE

PathScale Inc. develops technologies that enable breakthroughs in high
performance computing, science and engineering. The PathScale InfiniPath™
InfiniBand™ Adapter and EKOPath Compiler Suite drive Linux® clusters
to performance levels that can exceed the world's most powerful
supercomputers. Today, PathScale technologies are the choice of leading
scientific and engineering organizations to more effectively solve complex
computational challenges, from aerospace and automotive design simulations to
weather modeling and drug discovery. PathScale is headquartered in Mountain
View, Calif. For more information, visit www.pathscale.com.

MEDIA CONTACTS

Christine Flavio
Director, Corporate Communications
PathScale, Inc.
(650) 934-8100
chrisflavio@pathscale.com

Graham McKenna
PR Manager
Pacifico Integrated Marketing Communications
(408) 293-8600 x335
gmckenna@pacifico.com